Motor and air conditioner

Abstract

The utility model discloses a motor and an air conditioner, the motor comprises a housing, a rotor assembly and a stator assembly, the housing comprises a plurality of installation parts, and the plurality of installation parts are located on the outer circumferential wall of the housing and are arranged at intervals along the circumferential direction of the housing; the rotor assembly is rotationally arranged in the shell; the stator assembly is fixedly connected in the shell and is wound on the periphery of the rotor assembly; the shell further comprises a plurality of heat dissipation sets, the heat dissipation sets and the installation parts are alternately arranged in the circumferential direction, each heat dissipation set comprises a plurality of heat dissipation ribs, and the heat dissipation ribs are located on the outer circumferential wall of the shell. The motor is good in heat dissipation effect and high in material utilization rate.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical equipment, in particular to a motor and an air conditioner. Background Art

[0002] The motor of the air conditioner will generate a lot of heat during operation, which will cause the motor temperature to rise and affect the service life of the motor. To this end, in the related art, heat dissipation ribs are provided on the outer wall surface of the motor housing to improve the heat dissipation of the motor. However, the effective heat dissipation area of ​​the existing heat dissipation rib solution is small, which not only fails to reduce the temperature rise of the motor, but even causes the temperature rise of the motor to further increase, the heat dissipation effect of the motor is deteriorated, and the material utilization rate is low. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a motor with good heat dissipation effect and high material utilization rate.

[0004] The utility model also provides an air conditioner with the motor.

[0005] According to the first aspect of the utility model, the motor comprises a shell, comprising a plurality of mounting parts, wherein the plurality of mounting parts are located on the outer peripheral wall of the shell and are arranged at intervals along the circumferential direction of the shell; a rotor assembly is rotatably arranged in the shell; a stator assembly is fixedly connected in the shell and is arranged around the outer periphery of the rotor assembly; wherein the shell further comprises a plurality of heat dissipation groups, wherein the plurality of heat dissipation groups and the plurality of mounting parts are alternately arranged along the circumferential direction, and the heat dissipation groups comprise a plurality of heat dissipation ribs, wherein the heat dissipation ribs are located on the outer peripheral wall of the shell.

[0006] The motor according to the embodiment of the first aspect of the utility model has at least the following beneficial effects: a plurality of heat dissipation groups and a plurality of mounting portions are alternately arranged along the circumferential direction of the shell. On the one hand, the heat dissipation ribs of the heat dissipation group can increase the heat dissipation area of ​​the motor, accelerate the heat dissipation efficiency, effectively reduce the temperature rise of the motor, and achieve good heat dissipation effect; on the other hand, it can avoid the mounting portion blocking the wind flow through the heat dissipation ribs along the axial direction of the motor, causing the heat of the heat dissipation ribs to be unable to dissipate quickly, thereby increasing the effective heat dissipation area ratio of the heat dissipation group and further improving the material utilization rate.

[0007] According to some embodiments of the present invention, the shell has a first end face and a second end face that are opposite to each other in the axial direction of the rotor assembly, and the heat dissipation ribs extend from the first end face to the second end face.

[0008] According to some embodiments of the utility model, the heat dissipation rib has a first wall surface and a second wall surface that are opposite to each other along the circumferential direction, the rotation axis of the rotor assembly is parallel to the first wall surface or is located in the plane where the first wall surface is located, and the rotation axis of the rotor assembly is parallel to the second wall surface or is located in the plane where the second wall surface is located.

[0009] According to some embodiments of the present invention, the protruding height of the heat dissipating rib relative to the outer peripheral wall of the shell decreases from the middle to both ends along the axial direction.

[0010] According to some embodiments of the utility model, the heat dissipation rib is provided with chamfers at both ends along the axial direction and is formed with two inclined surfaces located on the side of the heat dissipation rib away from the rotation axis of the rotor assembly, and the vertical distance between the inclined surface and the outer peripheral wall of the shell decreases from the middle of the heat dissipation rib along the axial direction to the end.

[0011] According to some embodiments of the present invention, the distance between the two ends of the chamfer along the axial direction is X, and the distance between the two ends of the chamfer along the axial direction in the radial direction of the rotor assembly is Y, satisfying: 7≤X / Y≤9.

[0012] According to some embodiments of the utility model, in each heat dissipation group, a plurality of heat dissipation ribs are arranged at intervals along the circumferential direction, and a minimum spacing between any two adjacent heat dissipation ribs along the circumferential direction is L, satisfying: 4mm≤L≤6mm.

[0013] According to some embodiments of the present utility model, the maximum protruding height of the heat dissipating rib relative to the outer peripheral wall of the shell is H, which satisfies: 4mm≤H≤6mm.

[0014] According to some embodiments of the present utility model, the heat dissipation rib has a first wall surface and a second wall surface that are opposite to each other along the circumferential direction, and a minimum distance between the first wall surface and the second wall surface is T, satisfying: 1.5mm≤T≤2mm.

[0015] An air conditioner according to an embodiment of the second aspect of the utility model comprises the motor according to the embodiment of the first aspect of the utility model.

[0016] The air conditioner according to the embodiment of the second aspect of the utility model has at least the following beneficial effects: since the air conditioner adopts the above-mentioned motor, multiple heat dissipation groups and multiple mounting parts are alternately arranged along the circumferential direction of the shell. On the one hand, the heat dissipation ribs of the heat dissipation group can increase the heat dissipation area of ​​the motor, accelerate the heat dissipation efficiency, effectively reduce the temperature rise of the motor, and have a good heat dissipation effect; on the other hand, it can avoid the mounting part blocking the wind flow through the heat dissipation ribs along the axial direction of the motor, resulting in the heat of the heat dissipation ribs being unable to dissipate quickly, thereby increasing the effective heat dissipation area ratio of the heat dissipation group, and then improving the material utilization rate.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0019] Figure 1 It is a three-dimensional diagram of the motor in the embodiment of the utility model;

[0020] Figure 2 yes Figure 1 Axial schematic diagram of the motor shown;

[0021] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0022] Figure 4 yes Figure 1 A cross-sectional view of the motor shown.

[0023] Reference numerals:

[0024] Shell 100; mounting portion 110; heat dissipation group 120; heat dissipation ribs 121; first wall surface 1211; second wall surface 1212; chamfer 1213; main body 130; first end surface 131; second end surface 132; end cover 140;

[0025] Rotor assembly 200; rotating shaft 210; waterproof cover 220;

[0026] Stator assembly 300;

[0027] A first bearing 400;

[0028] A second bearing 500;

[0029] Bearing seat 600. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0031] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0033] In the description of the present utility model, unless otherwise clearly defined, terms such as setting, installing, connecting, assembling, and matching should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present utility model based on the specific content of the technical solution.

[0034] The motor of the air conditioner will generate a lot of heat during operation. The heat mainly comes from the heating of the motor winding, that is, copper loss, which will cause the motor temperature to rise and affect the service life of the motor. For this reason, in the related art, heat dissipation of the motor is improved by setting heat dissipation ribs on the outer wall of the motor housing. However, since the motor housing is usually thermosetting plastic, its thermal conductivity is low, and the heat generated by the motor is difficult to conduct to the heat dissipation ribs at a position far away from the motor shaft and windings, and the installation structure of the housing has the problem of blocking the wind from flowing to the heat dissipation ribs, resulting in the heat dissipation ribs not being able to fully play their role, resulting in a small proportion of effective heat dissipation area, not only failing to reduce the temperature rise of the motor, but even causing the temperature rise of the motor to further increase due to the inability to quickly dissipate the heat, the heat dissipation effect of the motor is deteriorated, and the material utilization rate is low.

[0035] For this purpose, refer to Figures 1 to 4 As shown, the first embodiment of the utility model provides a motor, which is mainly used in the outdoor unit of the air conditioner to drive the wind wheel to rotate so as to increase the heat exchange efficiency of the outdoor unit. Of course, the motor can also be used in the indoor unit of the air conditioner, and is also used to drive the wind wheel to rotate so as to increase the heat exchange efficiency of the indoor unit.

[0036] Reference Figure 1 and Figure 4As shown, it can be understood that the motor includes a housing 100, a rotor assembly 200 and a stator assembly 300, wherein the housing 100 includes a main body 130 and an end cover 140, the main body 130 is generally cylindrical in structure and is provided with a through installation cavity, and the main body 130 and the end cover 140 are both plastic parts, such as thermosetting plastics. The main body 130 is wrapped around the outer periphery of the stator assembly 300 by an injection molding process, and the structural form of the stator assembly 300 is well known to those skilled in the art and will not be repeated here. The stator assembly 300 has an inner hole, and the rotor assembly 200 is rotatably arranged in the inner hole of the stator assembly 300, that is, the rotor assembly 200 is installed in the installation cavity of the housing 100. Similarly, the structural form of the rotor assembly 200 is well known to those skilled in the art and will not be repeated here.

[0037] Reference Figure 1 and Figure 4 As shown, it can be understood that the motor further includes a first bearing 400, a second bearing 500 and a bearing seat 600, the end cover 140 is connected to one end of the main body 130 along the axial direction of the rotor assembly 200, the first bearing 400 is installed on the end cover 140, the bearing seat 600 is embedded in the other end of the main body 130 along the axial direction of the rotor assembly 200, and the second bearing 500 is installed on the bearing seat 600. The rotor assembly 200 is fixedly connected with a rotating shaft 210, and the rotating shaft 210 is installed on the first bearing 400 and the second bearing 500, so as to achieve accurate positioning of the rotor assembly 200, which is conducive to ensuring the coaxiality of the stator assembly 300 and the rotor assembly 200. One end of the rotating shaft 210 away from the end cover 140 passes through the installation cavity of the housing 100. In order to improve the waterproof performance, the rotating shaft 210 is fixedly connected with a waterproof cover 220, which is located on the side of the bearing seat 600 away from the end cover 140, and the waterproof cover 220 is set on the outer periphery of the second bearing 500. When the motor is running, the waterproof cover 220 rotates with the rotating shaft 210, and the waterproof cover 220 can prevent water from entering the second bearing 500, and has good waterproof performance.

[0038] It is easy to understand that the wind wheel is connected to the end of the rotating shaft 210 that passes through the installation cavity of the shell 100. When the motor is running, the wind wheel rotates with the rotating shaft 210, so that the outer periphery of the shell 100 can form wind that mainly flows along the axial direction of the rotor assembly 200.

[0039] Reference Figure 1 and Figure 2As shown, it can be understood that, in order to facilitate the installation of the motor in the outdoor unit, the housing 100 includes a plurality of mounting portions 110, and the plurality of mounting portions 110 are located on the outer peripheral wall of the housing 100 (i.e., the outer peripheral wall of the main body 130) and are arranged at equal intervals along the circumference of the housing 100, and the circumference of the housing 100 is the direction around the rotating shaft 210. The mounting portion 110 is arranged to protrude outward along the radial direction of the housing 100, and the mounting portion 110 and the main body 130 are an integral structure, which is convenient for processing. The radial direction of the housing 100 is the direction perpendicular to the rotating shaft 210, the outer direction is the direction away from the rotating shaft 210, and the direction close to the rotating shaft 210 is the inner direction. In addition, along the axial direction of the rotor assembly 200, the length of the mounting portion 110 is much smaller than the length of the main body 130. Generally speaking, the mounting portion 110 is provided with a mounting hole that penetrates along the axial direction of the rotor assembly 200. Therefore, when installing the motor, screws or bolts can be inserted into the mounting holes of the mounting portion 110, and the motor can be fixedly connected to the outdoor unit by screws or bolts, so that the motor can be fixedly installed, and the connection is stable and reliable. Similarly, the motor can also be fixedly installed on the indoor unit through the mounting portion 110, which will not be described here. In this embodiment, the outer peripheral wall of the housing 100 is provided with four mounting portions 110, and the four mounting portions 110 are arranged at equal intervals along the circumference of the housing 100 to improve the stability of the installation of the motor.

[0040] Reference Figure 1 and Figure 2As shown, it can be understood that the housing 100 also includes a plurality of heat dissipation groups 120, and each heat dissipation group 120 includes a plurality of heat dissipation ribs 121. Specifically, the plurality of heat dissipation groups 120 and the plurality of mounting portions 110 are alternately arranged at intervals along the circumference of the housing 100, that is, each heat dissipation group 120 is respectively arranged between two adjacent mounting portions 110. The heat dissipation ribs 121 are located on the outer peripheral wall of the housing 100 (i.e., the outer peripheral wall of the main body 130), and the plurality of heat dissipation ribs 121 of each heat dissipation group 120 are equally spaced along the circumference of the housing 100. In this embodiment, the number of mounting portions 110 and heat dissipation groups 120 is four. The number of heat dissipation ribs 121 of each heat dissipation group 120 is determined according to the spacing between two adjacent heat dissipation ribs 121. The spacing between two adjacent heat dissipation ribs 121 can be set according to the wind volume and wind speed of the wind wheel. The wind volume and wind speed of the wind wheel are large, which can ensure that the air can quickly take away the heat on the heat dissipation ribs 121. The spacing between two adjacent heat dissipation ribs 121 can be set to be smaller. Under the premise that the outer diameter of the shell 100 remains unchanged, the number of heat dissipation ribs 121 of each heat dissipation group 120 is large, which is conducive to increasing the heat dissipation area and improving the heat dissipation efficiency. On the contrary, the wind volume and wind speed of the wind wheel are small, and the air cannot quickly take away the heat on the heat dissipation ribs 121. In order to avoid the accumulation of heat in the heat dissipation ribs 121 and cause the heat dissipation effect to deteriorate, the spacing between two adjacent heat dissipation ribs 121 can be set to be larger to increase the heat dissipation space between the two adjacent heat dissipation ribs 121, thereby improving the heat dissipation efficiency. The equal spacing of multiple heat dissipation ribs 121 along the circumference of the shell 100 is conducive to the uniform heat dissipation of the motor in the circumference.

[0041] Reference Figure 2 As shown, it can be understood that in the cross section perpendicular to the rotating shaft 210, the cross section of the heat dissipation rib 121 can be rectangular, triangular, fan-shaped, etc. In this embodiment, the cross section of the heat dissipation rib 121 is rectangular. The heat dissipation rib 121 and the main body 130 are an integral structure, and the heat dissipation rib 121 can be directly formed when the main body 130 is produced, which is easy to process.

[0042] Therefore, on the one hand, by arranging a plurality of heat dissipation ribs 121 on the outer peripheral wall of the shell 100, the heat dissipation area of ​​the motor can be increased, and the heat generated by the motor is conducted to the surface of the heat dissipation ribs 121. The wind wheel drives the air to flow through the surface of the heat dissipation ribs 121. The fast-flowing air exchanges heat with the heat dissipation ribs 121 and quickly takes away the heat of the heat dissipation ribs 121, thereby achieving heat dissipation for the motor, effectively accelerating the heat dissipation efficiency, and reducing the temperature rise of the motor. The temperature of the motor winding drops from 116.6°C to 113.4°C, and the heat dissipation effect is good.

[0043] It is easy to understand that, under the action of the wind wheel, the wind on the periphery of the housing 100 mainly flows along the axial direction of the rotor assembly 200, and the mounting portion 110 will block the flow of wind. If there are heat dissipation ribs 121 located at both ends of the mounting portion 110 along the axial direction of the rotor assembly 200, the mounting portion 110 will have a blocking effect on the air flowing through the heat dissipation ribs 121 of this part, resulting in the air being unable to quickly take away the heat of the heat dissipation ribs 121 of this part, and the heat is accumulated in the heat dissipation ribs 121 of this part, resulting in an increase in the temperature rise of the motor, a deterioration in the heat dissipation effect, and the heat dissipation effect of the heat dissipation ribs 121 of this part cannot be fully utilized.

[0044] To this end, on the other hand, multiple heat dissipation groups 120 and multiple mounting parts 110 are arranged alternately and spaced along the circumference of the housing 100, that is, the heat dissipation ribs 121 are respectively located on one side of the mounting part 110 along the circumference of the housing 100, and there are no heat dissipation ribs 121 at both ends of the mounting part 110 along the axial direction of the rotor assembly 200. Therefore, the mounting part 110 will not block the air from flowing through the surface of the heat dissipation rib 121 located on one side of the mounting part 110 along the circumference of the housing 100, so that the heat dissipation effect of the heat dissipation rib 121 can be fully exerted, so that the heat on the surface of the heat dissipation rib 121 can be quickly dissipated. Then, the effective heat dissipation area ratio of the heat dissipation group 120 is effectively increased, and the material utilization rate is improved. The material utilization rate can be understood as the ratio of the total heat dissipation to the volume of the heat dissipation structure, that is, the heat dissipation of the heat dissipation structure per unit volume. The greater the heat dissipation of the heat dissipation structure per unit volume, the higher the material utilization rate, and vice versa. In this embodiment, since the multiple heat dissipation ribs 121 can fully exert the heat dissipation effect, the heat dissipation of the heat dissipation rib 121 per unit volume is large, so the material utilization rate can be improved.

[0045] Reference Figure 4 As shown, it can be understood that the housing 100 has a first end face 131 and a second end face 132 that are opposite to each other along the axial direction of the rotor assembly 200, that is, the wall surface of one end of the main body 130 along the axial direction of the rotor assembly 200 is the first end face 131, and the wall surface of the other end is the second end face 132. Along the axial direction of the rotor assembly 200, the two ends of the heat dissipation rib 121 extend to the first end face 131 and the second end face 132 respectively, that is, the heat dissipation rib 121 extends from the first end face 131 to the second end face 132. Therefore, the heat dissipation rib 121 can occupy the range of the main body 130 in the axial direction of the rotor assembly 200, thereby increasing the heat dissipation area of ​​the heat dissipation rib 121, that is, increasing the heat dissipation area of ​​the motor, thereby improving the heat dissipation efficiency and reducing the temperature rise of the motor.

[0046] Reference Figure 2 and Figure 3As shown, it can be understood that in the cross section perpendicular to the rotating shaft 210, the cross section of the heat dissipation rib 121 is a rectangle. Along the circumference of the housing 100, the heat dissipation rib 121 has a first wall 1211 and a second wall 1212 that are separated from each other, and the first wall 1211 and the second wall 1212 are both parallel to the rotation axis of the rotor assembly 200, or the rotation axis of the rotor assembly 200 is located in the plane where the first wall 1211 is located, and the second wall 1212 is parallel to the rotation axis of the rotor assembly 200, or the first wall 1211 is parallel to the rotation axis of the rotor assembly 200, and the rotation axis of the rotor assembly 200 is located in the plane where the second wall 1212 is located, or the rotation axis of the rotor assembly 200 is located in both the plane where the first wall 1211 is located and the plane where the second wall 1212 is located, that is, the plane where the first wall 1211 is located and the plane where the second wall 1212 is located intersect with the rotation axis of the rotor assembly 200. Here, the rotation axis of the rotor assembly 200 is the central axis of the rotating shaft 210. Therefore, the heat dissipation rib 121 is a straight strip structure parallel to the axial direction of the rotor assembly 200, which is conducive to reducing the flow resistance of the air flowing through the heat dissipation rib 121, increasing the amount of air that exchanges heat with the heat dissipation rib 121 per unit time, and allowing the air to quickly take away the heat on the surface of the heat dissipation rib 121, thereby improving the heat dissipation efficiency and reducing the temperature rise of the motor.

[0047] It is understandable that, since the heat dissipation ribs 121 and the main body 130 are an integral structure, and both the heat dissipation ribs 121 and the main body 130 are plastic parts, and the thermal conductivity of plastic parts is low, the heat generated by the motor is difficult to be conducted to a position far from the rotating shaft 210 and the winding. For example, in this embodiment, the corners of the heat dissipation ribs 121 located at both ends along the axial direction of the rotor assembly 200 and away from the rotating shaft 210 are far away from the rotating shaft 210 and the winding, and the heat generated by the motor can basically not be conducted to the two corners, that is, the heat dissipation ribs 121 at the corners basically do not participate in heat dissipation, resulting in a decrease in the proportion of effective heat dissipation area and a decrease in material utilization.

[0048] For this purpose, refer to Figure 4 As shown, it can be understood that the heat dissipation rib 121 is configured to have a protruding height relative to the outer peripheral wall of the shell 100 that decreases from the middle to both ends along the axial direction of the rotor assembly 200, that is, the corners at both ends of the heat dissipation rib 121 are cut off. For example, the heat dissipation rib 121 is provided with chamfers 1213 at both ends along the axial direction of the rotor assembly 200, and the chamfers 1213 are chamfered or rounded, thereby cutting off the corners, so that under the premise of ensuring that the heat dissipation of the heat dissipation rib 121 remains unchanged, the proportion of effective heat dissipation area can be increased, thereby improving material utilization.

[0049] It is easy to understand that by cutting off the corners, the flow resistance of the heat dissipation ribs 121 to the air can be reduced to a certain extent, thereby accelerating the speed at which the air carries away the heat of the heat dissipation ribs 121, that is, improving the heat dissipation efficiency, and then reducing the temperature rise of the motor.

[0050] Reference Figure 4 As shown, it can be understood that the heat dissipation rib 121 is provided with a chamfer 1213 to form an inclined surface or an arc surface, and the opening of the arc surface can be toward the rotating shaft 210 or away from the rotating shaft 210. In this embodiment, the heat dissipation rib 121 forms an inclined surface at the position of the chamfer 1213, that is, the inclined surface is located on the side of the heat dissipation rib 121 away from the rotation axis of the rotor assembly 200, and the inclined surfaces at both ends are arranged symmetrically. The vertical distance between the inclined surface and the outer peripheral wall of the main body 130 is delivered from the middle of the heat dissipation rib 121 along the axial direction of the rotor assembly 200 to the end, that is, with the outer peripheral wall of the shell 100 as a reference, one end of the inclined surface close to the middle position of the heat dissipation rib 121 is higher than the other end. The inclined surface is a wall surface formed by setting a chamfer. Therefore, the corners that are basically not involved in heat dissipation can be cut off, the proportion of effective heat dissipation area is increased, and the material utilization rate is improved.

[0051] Reference Figure 4 As shown, it can be understood that, in order to facilitate demoulding and further reduce the flow resistance of the heat dissipation rib 121 to air, the inclined surfaces at both ends of the heat dissipation rib 121 are connected by rounded transition, and the inclined surfaces at both ends are respectively connected to the first end surface 131 and the second end surface 132 of the main body 130 by rounded transition. In other words, the wall surface formed by the heat dissipation rib 121 at the position of the chamfer 1213 is a curved surface, a slope and a curved surface connected in sequence.

[0052] Reference Figure 4 As shown, it can be understood that, along the axial direction of the rotor assembly 200, the distance between the two ends of the chamfer 1213 in the axial direction of the rotor assembly 200 is X, that is, the distance between the two ends of the back-facing arc surface in the wall surface formed by the heat dissipation rib 121 at the position of the chamfer 1213 in the axial direction of the rotor assembly 200 is X. The distance between the two ends of the chamfer 1213 in the radial direction of the rotor assembly 200 is Y, that is, the distance between the two ends of the back-facing arc surface in the wall surface formed by the heat dissipation rib 121 at the position of the chamfer 1213 in the radial direction of the rotor assembly 200 is Y, which satisfies: 7≤X / Y≤9. If X / Y<7, the chamfer 1213 is too small, the heat dissipation rib 121 has a structure that basically does not participate in heat dissipation, the proportion of effective heat dissipation area is small, and the material utilization rate is low; if X / Y>9, the chamfer 1213 is too large, there is a problem that the structure participating in heat dissipation on the heat dissipation rib 121 is cut off, and the heat dissipation effect is deteriorated. Therefore, by making 7≤X / Y≤9, it can be ensured that the heat dissipation rib 121 has a good heat dissipation effect, reduce the temperature rise of the motor, and improve the material utilization rate.

[0053] Reference Figure 3As shown, it can be understood that in each heat dissipation group 120, the minimum spacing between any two adjacent heat dissipation ribs 121 along the circumference of the rotor assembly 200 is L, that is, the minimum distance between any two adjacent heat dissipation ribs 121 relative to the two walls is L. When measuring L, the position where the distance between the two adjacent heat dissipation ribs 121 relative to the two walls is the smallest can be measured by using a vernier caliper. The minimum spacing between any two adjacent heat dissipation ribs 121 along the circumference of the rotor assembly 200 is L, which satisfies 4mm≤L≤6mm. If L<4mm, the space between the two adjacent heat dissipation ribs 121 is too small, the ventilation volume is insufficient, the air cannot quickly take away the heat on the heat dissipation ribs 121, and the heat accumulation leads to the deterioration of the heat dissipation effect. If L>6mm, the spacing between the two adjacent heat dissipation ribs 121 is too large, the number of heat dissipation ribs 121 is reduced, the heat dissipation area is reduced, and it is not conducive to heat dissipation. Therefore, making 4mm≤L≤6mm can effectively improve the heat dissipation efficiency, enhance the heat dissipation effect, and reduce the temperature rise of the motor.

[0054] Reference Figure 3 As shown, it can be understood that the maximum protruding height of the heat dissipation rib 121 relative to the outer peripheral wall of the housing 100 is defined as H. When measuring H, the distance between the position where the heat dissipation rib 121 is the largest from the outer peripheral wall of the housing 100 along the radial direction of the rotor assembly 200 and the outer peripheral wall of the housing 100 can be measured. The maximum protruding height of the heat dissipation rib 121 relative to the outer peripheral wall of the housing 100 is H, which satisfies: 4mm≤H≤6mm. If H<4mm, the protruding height of the heat dissipation rib 121 is too small, the effective heat dissipation area of ​​the heat dissipation rib 121 is small, and the heat dissipation effect is not good; since the heat dissipation rib 121 is a plastic part, the thermal conductivity of the plastic part is low, and the heat generated by the motor is difficult to conduct to a position far away from the rotating shaft 210 and the winding. If H>6mm, the protruding height of the heat dissipation rib 121 is too large, and the structure far away from the rotating shaft 210 and the winding in the heat dissipation rib 121 basically does not participate in the heat dissipation, the proportion of the effective heat dissipation area is small, and the material utilization rate is low. Therefore, by setting 4mm≤H≤6mm, it can be ensured that the heat dissipation rib 121 has a good heat dissipation effect, reduce the temperature rise of the motor, and improve the material utilization rate.

[0055] Reference Figure 3As shown, it can be understood that the minimum distance between the first wall 1211 and the second wall 1212 of the heat dissipation rib 121 is T, and T can be understood as the thickness of the heat dissipation rib 121. When measuring T, the vernier caliper can be directly clamped at the position where the distance between the first wall 1211 and the second wall 1212 is the smallest for measurement. The thickness T of the heat dissipation rib 121 satisfies: 1.5mm≤T≤2mm. Since the heat dissipation rib 121 is a plastic part, if T < 1.5mm, the thickness of the heat dissipation rib 121 is too small, the size is too small to be injection molded, the processing is difficult, and the structural strength of the heat dissipation rib 121 is poor and easy to break; if T > 2mm, the thickness of the heat dissipation rib 121 is too large, and the increase in the thickness of the heat dissipation rib 121 only increases the area of ​​the wall of the heat dissipation rib 121 away from the rotating shaft 210, but the volume of the heat dissipation rib 121 increases greatly, resulting in a decrease in material utilization and an increase in material cost. Therefore, by making 1.5 mm ≤ T ≤ 2 mm, the material cost can be effectively reduced and the material utilization rate can be improved while satisfying the processing requirements and ensuring the structural strength of the heat dissipation ribs 121 .

[0056] The air conditioner according to the second embodiment of the utility model comprises the motor according to the first embodiment of the utility model.

[0057] Since the air conditioner adopts all the technical solutions of the motor of the above embodiment, it has at least all the beneficial effects brought by the technical solutions of the above embodiment.

[0058] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A motor, characterized in that include: The housing comprises a plurality of mounting portions, wherein the plurality of mounting portions are located on the outer peripheral wall of the housing and are arranged at intervals along the circumference of the housing; A rotor assembly rotatably disposed in the housing; A stator assembly, fixedly connected to the housing and wound around the outer circumference of the rotor assembly; Wherein, the shell further includes a plurality of heat dissipation groups, the plurality of heat dissipation groups and the plurality of mounting portions are alternately arranged along the circumferential direction, the heat dissipation groups include a plurality of heat dissipation ribs, and the heat dissipation ribs are located on the outer peripheral wall of the shell.

2. The motor according to claim 1, characterized in that: The housing has a first end surface and a second end surface which are opposite to each other in the axial direction of the rotor assembly, and the heat dissipation ribs extend from the first end surface to the second end surface.

3. The motor according to claim 2, characterized in that: The heat dissipation rib has a first wall surface and a second wall surface which are opposite to each other along the circumferential direction. The rotation axis of the rotor assembly is parallel to the first wall surface or is located in the plane where the first wall surface is located. The rotation axis of the rotor assembly is parallel to the second wall surface or is located in the plane where the second wall surface is located.

4. The motor according to claim 2, characterized in that: The protruding height of the heat dissipation rib relative to the outer peripheral wall of the shell decreases from the middle to both ends along the axial direction.

5. The motor according to claim 4, characterized in that: The heat dissipation rib is provided with chamfers at both ends along the axial direction and is formed with two inclined surfaces located on the side of the heat dissipation rib away from the rotation axis of the rotor assembly, and the vertical distance between the inclined surface and the outer peripheral wall of the shell decreases from the middle of the heat dissipation rib along the axial direction to the end.

6. The motor according to claim 5, characterized in that: The distance between the two ends of the chamfer along the axial direction in the axial direction is X, and the distance between the two ends of the chamfer along the axial direction in the radial direction of the rotor assembly is Y, satisfying: 7≤X / Y≤9.

7. The motor according to claim 1, characterized in that: In each heat dissipation group, a plurality of heat dissipation ribs are arranged at intervals along the circumferential direction, and a minimum spacing between any two adjacent heat dissipation ribs along the circumferential direction is L, satisfying: 4mm≤L≤6mm.

8. The motor according to claim 1, characterized in that: The maximum protruding height of the heat dissipating rib relative to the outer peripheral wall of the shell is H, which satisfies: 4mm≤H≤6mm.

9. The motor according to claim 1, characterized in that: The heat dissipation rib has a first wall surface and a second wall surface which are opposite to each other along the circumferential direction, and a minimum distance between the first wall surface and the second wall surface is T, which satisfies: 1.5 mm ≤ T ≤ 2 mm.

10. An air conditioner, characterized in that Comprising a motor as claimed in any one of claims 1 to 9.

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